I got my 670 PE from msi about 3 weeks ago and i am not disappointed. It is so quiet even when playing games and the fans only really kick in on the stress tests like furmark and kombuster. On full load and running furmark for an hour it reached 67c and that is cooler than my 560 ti and the 670 is way faster.

clock speeds(with boost)

1319 mhz on the core
3304 mhz mem clock

I will be sticking with msi for a while if it keeps kicking out this performance. I could overclock more but this seems fast enough.